Last updated on August 30th, 2023 at 01:44 am
Class 9 Is Matter Around us Pure MCQ
Which of the following statements is true about mixtures?
- a) Mixtures contain only one substance.
- b) Mixtures cannot be separated into pure substances.
- c) Mixtures are homogeneous combinations of different substances.
- d) Mixtures have fixed compositions.
Answer: c) Mixtures are homogeneous combinations of different substances.
What is the major component of a solution called?
- a) Mixture
- b) Compound
- c) Solvent
- d) Solute
Answer: c) Solvent
Which term refers to a homogeneous mixture of two or more substances?
- a) Solution
- b) Compound
- c) Element
- d) Solvent
Answer: a) Solution
How can mixtures be separated into pure substances?
- a) Through chemical reactions
- b) By heating them to high temperatures
- c) By using appropriate separation techniques
- d) Mixtures cannot be separated into pure substances
Answer: c) By using appropriate separation techniques
What is the minor component in a solution called?
- a) Solute
- b) Solvent
- c) Mixture
- d) Compound
Answer: a) Solute
What is the definition of concentration in a solution?
- a) The amount of solute present per unit volume of the solution.
- b) The amount of solvent present per unit mass of the solution.
- c) The ratio of solute to solvent in a solution.
- d) The total mass of the solution.
Answer: a) The amount of solute present per unit volume of the solution.
Which of the following statements is true about suspensions?
- a) Suspensions are homogeneous mixtures.
- b) Suspensions have particles that are too small to be seen with the naked eye.
- c) Suspensions have particles that are visible to the naked eye.
- d) Suspensions are useful in industry but not in daily life.
Answer: c) Suspensions have particles that are visible to the naked eye.
What is the term for heterogeneous mixtures in which the particle size is too small to be seen with the naked eye, but is big enough to scatter light?
- a) Solutions
- b) Compounds
- c) Suspensions
- d) Colloids
Answer: d) Colloids
What are the particles called in a colloid?
- a) Solute
- b) Solvent
- c) Dispersed phase
- d) Dispersion medium
Answer: c) Dispersed phase
What is the medium in which the dispersed phase particles are distributed called?
- a) Solute
- b) Solvent
- c) Dispersed phase
- d) Dispersion medium
Answer: d) Dispersion medium
Which of the following statements is true about pure substances?
- a) Pure substances can only be compounds.
- b) Pure substances can only be elements.
- c) Pure substances can be elements or compounds.
- d) Pure substances can be broken down by chemical reactions.
Answer: c) Pure substances can be elements or compounds.
What is an element?
- a) A substance composed of two or more different types of elements.
- b) A substance that can be broken down into simpler substances by chemical reactions.
- c) A form of matter that cannot be broken down by chemical reactions into simpler substances.
- d) A substance that exhibits the properties of its constituent elements or compounds.
Answer: c) A form of matter that cannot be broken down by chemical reactions into simpler substances.
What is a compound?
- a) A substance composed of two or more different types of elements.
- b) A substance that can be broken down into simpler substances by chemical reactions.
- c) A form of matter that cannot be broken down by chemical reactions into simpler substances.
- d) A substance that exhibits the properties of its constituent elements or compounds.
Answer: a) A substance composed of two or more different types of elements.
How do the properties of a compound compare to its constituent elements?
- a) The properties of a compound are the same as its constituent elements.
- b) The properties of a compound are different from its constituent elements.
- c) The properties of a compound can be both the same and different from its constituent elements.
- d) The properties of a compound cannot be determined.
Answer: b) The properties of a compound are different from its constituent elements.
How do the properties of a mixture compare to its constituting elements or compounds?
a) The properties of a mixture are the same as its constituting elements or compounds.
b) The properties of a mixture are different from its constituting elements or compounds.
c) The properties of a mixture can be both the same and different from its constituting elements or compounds.
d) The properties of a mixture cannot be determined.
Answer: a) The properties of a mixture are the same as its constituting elements or compounds.
